Coles Varitey Crinkle Cut Chips / smell and holes in product

i had two packets of cheese and onion chips from the coles varitey crinkle cut chips and my partner and i smelt this really strong fish like smell at first we didnt think anything of it and carried on eating them, i finished the first pack and when i went to open the second pack there were holes all the way through the packet and the smell was over whelming. There was also black things in there .I became sick after eating this and i am also pregnant.